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From: casper@csuvax1.csu.murdoch.edu.au (Casper Boon)
Newsgroups: comp.sys.amiga,comp.sys.mac.misc
Subject: Re: Murph's VAPORWARE Column for October 1990
Message-ID: <1990Oct4.060034.18992@csuvax1.csu.murdoch.edu.au>
Date: 4 Oct 90 06:00:34 GMT
References: <3808.2708cdc4@cc.curtin.edu.au> <1990Oct2.204600.7070@cbnewsk.att.com>
Organization: Murdoch University
Lines: 61

ech@cbnewsk.att.com (ned.horvath) writes:

>From article <3808.2708cdc4@cc.curtin.edu.au>, by North_TJ@cc.curtin.edu.au (Tim North):
>> In article <9009280355.AA23389@lilac.berkeley.edu>, Sewall@UConnVM.BITNET 
>> (Murph Sewall) writes:
>>> 
>>>                          VAPORWARE
>>>                        Murphy Sewall
>>>               From the October 1990 APPLE PULP
>>> 
>>> A Real 3-D Display.
>>> Texas Instruments has shown a "bubble" display two feet in
>>> diameter which "floats" three dimensional images within a

---- stuff deleted -----

>>> early as next year.  - InfoWorld 20 August
>>> 
>> 
>> You've GOT to be kidding! ACKK! Is this for real? Whoa man, what centuru is 
>> this?! I mean this isn't for reeee-al is it? Quick, what day is it -- nope not
>> April first...
>> 
>> Somebody tell me it isn't possible yet -- please!
>> 
>> Tim North


>Take a vector display.  Substitute a visible light beam for the electron gun.
>Mount it horizontally (shooting up).  Spin a helical glass plate over it as
>a projection surface.

>Wrap a transparent box around it so nobody puts their fingers in the 
>Cuisinart.

>The spinning helical projection surface effectively allows you to translate
>any point (x, y, z) to (x, y, t(x, y, z)), where t is time.

>Use three beams for RGB.

>Pretty slick.  Now, what I'd like to know (since I've only seen "stills") is
>how bad the flicker is...

>=Ned Horvath=

Another variant on this theme appeared in "The Australian" on the first of May
of this year which refered to a project at MIT using holograms, the "trick"
being to use sound to vary the refraction in a crystal that a laser passes
through.  Also surprisingly simple in concept, once you know how....


================================================================
Casper A. Boon,                casper@csuvax1.csu.murdoch.edu.au
Computer Science Programme,
Maths and Physical Sciences Department,
Murdoch University, South Street,
Murdoch, Western Australia, 6152.
PHONE:  (09) 332 2790                   OVERSEAS: +61 9 332 2790
================================================================

(PS Hi Tim.....  :-)